Description
Madbull SI Mega Fins KeyMod Handguard Rail 7"
Experience elite performance and cutting-edge design with the Madbull SI Mega Fins KeyMod Handguard Rail in a compact 7" length. Created in collaboration with Strike Industries, this ultra-lightweight rail is engineered for shooters who demand modularity, ergonomics, and rugged reliability without the added bulk. Whether you're building a custom AR platform or upgrading your existing setup, the Mega Fins handguard delivers function and form in one sleek package.
Named after the unique internal “fins” that help dissipate barrel heat, this rail keeps your weapon cooler during sustained use. The innovative heptagonal (7-sided) KeyMod layout offers nearly unlimited placement options for accessories—mount lights, grips, or lasers exactly where you need them. A continuous 1913 Picatinny top rail ensures compatibility with optics and other top-mounted gear, while the slim profile provides a comfortable, natural grip. Light in hand, heavy on features—this handguard is a tactical standout for serious shooters.
Highlights
- Official Strike Industries and Madbull collaboration
- 7-inch ultra-lightweight KeyMod handguard
- Internal heat-dispersing “Mega Fins” design
- Heptagonal 7-sided KeyMod system for full accessory placement
- Continuous 1913 Picatinny top rail
- Streamlined, ergonomic profile for improved handling
- Perfect for compact AR builds or tactical configurations
- Durable construction without added bulk
What's Included
- 1x Madbull SI Mega Fins 7" KeyMod Handguard
- Mounting hardware
- Installation guide
Technical Specifications
- Length: 7 inches
- Material: Lightweight alloy construction
- Rail System: 7-sided KeyMod with full Picatinny top rail
- Heat Management: Internal Mega Fins for improved cooling
- Compatibility: AR-15 / M4 style platforms
Product Reviews
Delivery & Returns
Delivery Information
Affordable Shipping – Starting from Just £2.50
Our delivery prices begin at only £2.50 for UK mainland orders, with free standard delivery available on all orders over £100*. To quickly find out the exact shipping cost for your items, simply add everything to your basket. In the basket, you'll see a link under the subtotal titled "Estimate Shipping & Tax"—click this, enter your delivery details, and you’ll get a full quote including whether you qualify for free shipping.
Free Shipping Offers
- UK Mainland: Free on orders over £100*
- Northern Ireland, Republic of Ireland, Scottish Highlands & Islands, and Isle of Man: Free on orders over £100*
- Channel Islands: Unfortunately, we do not offer free shipping to this region
*Free shipping is a 5 working day service. For example, an order placed on Monday would typically arrive the following Monday.
Mainland UK Delivery Options
- Royal Mail: From £2.50 (2 working days, price based on weight)
- Economy Delivery: £4.95 flat rate (2–4 working days)
- Express Delivery: £6.95 flat rate (1–2 working days)
Working days exclude Saturdays, Sundays, and public holidays. Need your order on a Saturday? We can arrange this for £20—please contact us directly after placing your order to pay the balance.
Delivery Prices – Outside Mainland UK
- Northern Ireland: From £5.95
- Scottish Highlands & Islands: From £5.95
- Isle of Man: From £5.95
- Republic of Ireland: £6.95 flat rate (any size order)
- Channel Islands: £7.95 flat rate (any size order)
We strive to keep our delivery charges as fair and straightforward as possible, with clear options to suit all needs and budgets.
